From patchwork Thu Sep 12 09:55:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Disseldorp X-Patchwork-Id: 11142701 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F267E18A6 for ; Thu, 12 Sep 2019 09:56:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D7228206A5 for ; Thu, 12 Sep 2019 09:56:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730683AbfILJ4A (ORCPT ); Thu, 12 Sep 2019 05:56:00 -0400 Received: from mx2.suse.de ([195.135.220.15]:53778 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730428AbfILJz7 (ORCPT ); Thu, 12 Sep 2019 05:55:59 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 468F3B6EA; Thu, 12 Sep 2019 09:55:58 +0000 (UTC) From: David Disseldorp To: target-devel@vger.kernel.org Cc: martin.petersen@oracle.com, mchristi@redhat.com, bvanassche@acm.org, David Disseldorp Subject: [PATCH 2/3] target: fix SendTargets=All string compares Date: Thu, 12 Sep 2019 11:55:46 +0200 Message-Id: <20190912095547.22427-3-ddiss@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190912095547.22427-1-ddiss@suse.de> References: <20190912095547.22427-1-ddiss@suse.de> Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org strncmp is currently used for "SendTargets" key and "All" value matching without checking for trailing garbage. This means that Text request PDUs with garbage such as "SendTargetsPlease=All" and "SendTargets=Alle" are processed successfully as if they were "SendTargets=All" requests. Signed-off-by: David Disseldorp --- drivers/target/iscsi/iscsi_target.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index d19e051f2bc2..09e55ea0bf5d 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -2189,24 +2189,22 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, } goto empty_sendtargets; } - if (strncmp("SendTargets", text_in, 11) != 0) { + if (strncmp("SendTargets=", text_in, 12) != 0) { pr_err("Received Text Data that is not" " SendTargets, cannot continue.\n"); goto reject; } + /* '=' confirmed in strncmp */ text_ptr = strchr(text_in, '='); - if (!text_ptr) { - pr_err("No \"=\" separator found in Text Data," - " cannot continue.\n"); - goto reject; - } - if (!strncmp("=All", text_ptr, 4)) { + BUG_ON(!text_ptr); + if (!strncmp("=All", text_ptr, 5)) { cmd->cmd_flags |= ICF_SENDTARGETS_ALL; } else if (!strncmp("=iqn.", text_ptr, 5) || !strncmp("=eui.", text_ptr, 5)) { cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE; } else { - pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); + pr_err("Unable to locate valid SendTargets%s value\n", + text_ptr); goto reject; }